Why was Enlightenment philosophy was a threat to European monarchies?

Enlightenment philosophy promoted ideals of reason, individual rights, and the separation of church and state, challenging the divine right of monarchs to rule. This threatened monarchies because it questioned their authority and legitimacy, advocating for more representative governments and limited monarchial power. Monarchs saw these ideas as a potential threat to their absolute rule and faced opposition from Enlightenment thinkers who sought to limit their control.